I wanted to reply to a previous topic about calls being blocked for 800-225-5288 but it is more than 60 days old.

To answer your question, AT&T is/was blocking you, not Vonage. The reason for this is Vonage is not ANI compliant and AT&T only looks at ANI which goes back to a number associated with a T1 belonging to Vonage. Many banks have already flagged Vonages T1 numbers as fraud because multiple people appear to be calling from the same number.

The reason many banks, calling card companies, phone companies, etc use ANI is because caller ID can be easily spoofed and not considered reliable. A clarification: caller ID and ANI have nothing to do with each other. ANI is the billing number transmitted by your phone company and caller ID is what we actually see on the display. The two can be different.

Until Vonage resolves this, you can expect call anomalies or more stringent treatment from your bank when you call. If a Vonage engineer happens to read this, take note.